JP3349052B2 - Seat storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet storage device for storing sheets cut from roll paper in a stacked state.

[0002]

2. Description of the Related Art Conventionally, there is a printing apparatus for printing using roll paper. In such a printing apparatus, as shown in FIG. 4, the roll paper 2 supported by the supply unit 1 is pulled out in one direction and printed by the printing unit 3, and the printed roll paper 2 is printed.
Is cut into units of a sheet 5 having a desired length by a cutter 4 and stored in a sheet storage 6.

In this example, the printing unit 3 includes a platen 7 and a thermal head 8 pressed against the platen 7.
Further, the cutter 4 has a fixed blade 9 and a movable blade 10, and drives the movable blade 10 in a state where tension is applied to the roll paper 2 between the platen 7 and the pair of discharge rollers 11, so that the roll paper is driven. 2 has been cut.

[0004] In this manner, the sheet 5 after printing on the roll paper 2 is used.
In the unit for cutting into units, in order to manage the sheet storage state of the sheet storage 6, a predetermined number of sheets 5 are stored in the sheet storage 6 by detecting the loading height of the sheets 5 stacked in the sheet storage 6. Some include a full detector 12 indicating that the sheet 5 is loaded. In this example, the full detector 12 is configured to store the sheets 5 stacked in the sheet storage 6.
A detection piece 14 that rotates about the fulcrum shaft 13 when the stacking height of the sensor reaches a predetermined value, and a photoelectric conversion element 15 that switches on and off when the detection piece 14 rotates by a certain angle or more. And That is, the distance between the lower end of the detection piece 14 and the bottom surface 16 of the sheet storage 6
Is loaded, the detection piece 14 rotates counterclockwise about the fulcrum shaft 13 so that the output of the photoelectric conversion element 15 is switched.

[0005]

SUMMARY OF THE INVENTION Roll paper 2 is transferred to sheet 5
When the sheet 5 is cut, a curl of curling remains on the sheet 5. This winding habit does not cause much problem when the roll paper 2 starts to be used with a large winding diameter, but the winding diameter decreases as it approaches the winding core, so that the winding habit also remains strong. As shown in FIG. 4, when the roll paper 2 is pulled out with its inner surface facing upward, the cut sheet 5 is bent so that the leading end and the trailing end jump upward, and is placed in the sheet storage 6. Is stored. In this case, the sheet 5 cut near the winding core has a strong curl and is largely curved, so that the straightness is deteriorated.
As a result, as shown by the dotted line, there is a sheet 5a that is caught at the rear end of the preceding sheet 5 at the entrance of the sheet storage 6, or the inner surface 6a on the back side in the discharge direction of the sheet storage 6 due to the subsequent sheet 5. Or the sheet 5b extruded to the outside. As described above, since the storage state of the sheets 5 is disturbed, it is necessary to increase the size of the sheet storage 6 in consideration of a margin. Further, since there are the sheets 5a and 5b which are displaced from the lower end of the detection piece 14, the detection signal of the full detector indicates that the sheet 5 actually stored in the sheet storage 6
Is less than the loading capacity of

[0006]

SUMMARY OF THE INVENTION The present invention relates to a sheet storage box having an upper surface opening for storing sheets, which are arranged at an end of a sheet conveying path and conveyed roll paper cut by a cutter, in a stacked state, Sheet detecting means for detecting the amount of stored sheets by having a detecting piece displaced in accordance with the stacking height of the sheets loaded in the storage, and discharging the sheet more than the detecting piece on the bottom surface of the sheet storage; A stopper protruding at a position on the sheet side to impart resistance to the sheet in the discharge direction, and a sheet for guiding the sheet discharged from the sheet conveyance path between a lower end of the detection piece and the stopper. A sheet guide that is inclined downward toward the discharge direction. Therefore, the sheet is guided by the sheet guide and is guided between the detection piece and the stopper on the bottom surface of the sheet storage. Even if the sheet is discharged into the sheet storage with both ends jumping up,
Since the sheet receives the resistance from the stopper, the sheet is not moved to the rear side in the discharge direction of the sheet storage. Therefore, all the sheets stored in the sheet storage are maintained in a state where they are located below the detection piece.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The same parts as those of the conventional structure described with reference to FIG. A stopper 17 is provided on the bottom surface 16 of the sheet storage 6 so as to protrude from the lower end of the detection piece 14 on the sheet discharge direction (rightward in the drawing) and impart resistance to the sheet 5 in the discharge direction. The sheet 5 discharged from the sheet conveying path 18 is inclined downward in the sheet discharging direction so as to be guided between the lower end of the detecting piece 14 of the full detector (sheet detecting means) 12 and the stopper 17. A sheet guide 19 is provided. The sheet guide 19 is the detection piece 1
A plurality of sheets 5 are arranged in the width direction of the sheet 5 with 4 therebetween.

Here, the detection piece 14 rotates until the output of the photoelectric conversion element 15 switches when the stacking height of the sheets 5 stacked on the bottom surface 16 of the sheet storage 6 reaches a certain value. The lower end of the detecting piece 14 is the sheet guide 1
It is determined so as to coincide with the lower end 20 of 9.

Next, the operation will be described. The roll paper 2 on which the data is printed by the printing unit 3 is cut into units of sheets 5 by the cutter 4, and the sheets 5 are conveyed by the discharge rollers 11 and sequentially stored in the sheet storage 6 in a stacked state. At this time, the sheet 5 is guided by the sheet guide 19 between the lower end of the detection piece 14 and the stopper 17.

In this case, as shown in FIG.
Since the winding diameter is large at the beginning of use, the curl remaining on the cut sheet 5 is weak. Therefore, the sheet 5 discharged to the sheet storage 6 has good straightness, and the leading end is aligned with the inner surface 6a on the far side of the sheet storage 6 beyond the stopper 17.
As shown in FIG. 2, when the roll paper 2 is close to the winding core, the winding diameter decreases, so that the curl remaining on the cut sheet 5 is strong. As a result, the sheet 5 bends so that both ends are jumped up, but is not moved toward the back side (the inner surface 6a side) of the sheet storage 6 in the discharge direction because the sheet 5 receives resistance from the stopper 17. Therefore, all the sheets 5 stored in the sheet storage 6 are maintained at a position below the detection piece 14.

Therefore, when the number of sheets 5 equal to or more than the number of sheets existing between the bottom surface 16 of the sheet storage 6 and the detection piece 14 is loaded, the detection piece 14 is moved by the pressure of the sheet 5 as shown in FIG. When the rotation angle exceeds a certain angle, the output of the photoelectric conversion element 15 switches. By the switching of this signal, the state where a certain amount of sheets 5 are stored in the sheet storage 6 is accurately detected.

[0012]

According to the present invention, a stopper is provided on the bottom surface of the sheet storage at a position closer to the sheet discharging direction than the detecting piece of the sheet detecting means to provide resistance to the sheet in the discharging direction. The sheet guide is inclined so as to guide the sheet between the lower end of the detection piece and the stopper, so that the sheet is guided by the sheet guide and guided between the detection piece and the stopper on the bottom of the sheet storage. can do. In this case, even if the sheet is curved in the sheet storage with both ends jumping up, the stopper can provide resistance to the sheet, and therefore,
It is possible to prevent the sheets from being shifted to the far side in the discharge direction of the sheet storage, and to maintain all the sheets stored in the sheet storage at the lower side of the detection piece. Thus, the detection piece can be accurately displaced according to the sheet stacking height to accurately detect the sheet stacking amount, and the size of the sheet storage can be reduced.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing a state of discharging sheets to a sheet storage according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional side view showing a state where the roll diameter of the roll paper is reduced.

FIG. 3 is a vertical sectional side view showing a state of discharging sheets to a sheet storage together with an operation of a sheet detecting unit.

FIG. 4 is a longitudinal sectional side view showing a state of discharging sheets to a conventional sheet storage.

[Explanation of symbols]

 2 Roll paper 4 Cutter 5 Sheet 6 Sheet storage 12 Sheet detection means 14 Detecting piece 16 Bottom of sheet storage 17 Stopper 18 Sheet transport path 19 Sheet guide

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65H 7/02 B65H 31/08

Claims (1)

(57) [Claims] 1. A sheet storage having an upper surface opening for storing sheets of roll paper conveyed by a cutter, which are arranged at an end of a sheet conveyance path and cut by a cutter, and the sheets stacked in the sheet storage. Sheet detecting means having a detecting piece displaced in accordance with the stacking height of the sheet detecting means for detecting the amount of stored sheets, and protrudingly provided at a position closer to the sheet discharging direction than the detecting piece on the bottom surface of the sheet storage box. A stopper that imparts resistance to the sheet in the sheet discharging direction, and a sheet that is discharged from the sheet conveyance path is inclined downward in the sheet discharging direction so as to be guided between the lower end of the detection piece and the stopper. A sheet storage device, comprising: